package com.car.loan.framework.aspectj;

import com.car.loan.common.utils.ObjectStruct;
import com.car.loan.common.utils.spring.SpringUtils;
import com.car.loan.framework.web.domain.BaseEntity;
import com.car.loan.project.system.domain.SysUser;
import java.lang.reflect.Method;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;
import com.car.loan.common.utils.ServletUtils;
import com.car.loan.common.utils.StringUtils;
import com.car.loan.framework.aspectj.lang.annotation.DataScope;
import com.car.loan.framework.security.LoginUser;
import com.car.loan.framework.security.service.TokenService;

/**
 * 数据过滤处理
 *
 * @author ruoyi
 */
@Aspect
@Component
public class DataScopeAspect {

    /**
     * 全部数据权限
     */
    public static final String DATA_SCOPE_ALL = "4";

    /**
     * 自定数据权限
     */
    public static final String DATA_SCOPE_CUSTOM = "3";

    /**
     * 部门数据权限
     */
    public static final String DATA_SCOPE_DEPT = "2";

    /**
     * 部门及以下数据权限
     */
    public static final String DATA_SCOPE_DEPT_AND_CHILD = "5";

    /**
     * 仅本人数据权限
     */
    public static final String DATA_SCOPE_SELF = "1";

    // 配置织入点
    @Pointcut("@annotation(com.car.loan.framework.aspectj.lang.annotation.DataScope)")
    public void dataScopePointCut() {
    }

    @Before("dataScopePointCut()")
    public void doBefore(JoinPoint point) throws Throwable {
        handleDataScope(point);
    }

    private void handleDataScope(final JoinPoint joinPoint) {
        // 获得注解
        DataScope controllerDataScope = getAnnotationLog(joinPoint);
        if (controllerDataScope == null) {
            return;
        }
        // 获取当前的用户
        LoginUser loginUser = SpringUtils.getBean(TokenService.class)
            .getLoginUser(ServletUtils.getRequest());
        SysUser currentUser = loginUser.getUser();
        if (currentUser != null) {
            // 如果是超级管理员，则不过滤数据
            if (!currentUser.isAdmin()) {
                dataScopeFilter(joinPoint, currentUser, controllerDataScope.deptAlias(),
                    controllerDataScope.userAlias());
            }
        }
    }

    /**
     * 数据范围过滤
     *
     * @param joinPoint 切点
     * @param user 用户
     * @param userAlias 别名
     */
    private static void dataScopeFilter(JoinPoint joinPoint, SysUser user, String deptAlias,
        String userAlias) {
        StringBuilder sqlString = new StringBuilder();

        String dataScope = user.getDataScope();
        if (DATA_SCOPE_ALL.equals(dataScope)) {
            sqlString = new StringBuilder();
        } else if (DATA_SCOPE_CUSTOM.equals(dataScope)) {
            //TODO 需要修改的地方 自定义数据权限
            sqlString.append(StringUtils.format(
                " OR {}.dept_id IN (  SELECT dept_id\n"
                    + " FROM sys_user_data_auth_dept\n"
                    + " WHERE user_id = {} ) OR {}.user_id IN (\n"
                    + " SELECT data_user_id AS user_id FROM sys_user_data_auth_user\n"
                    + " WHERE user_id = {} \n"
                    + " ) ",
                deptAlias,
                user.getUserId(),
                userAlias,
                user.getUserId()));
        } else if (DATA_SCOPE_DEPT.equals(dataScope)) {
            sqlString.append(
                StringUtils
                    .format(" OR {}.dept_id = {} OR {}.user_id = {} ", deptAlias, user.getDeptId(),
                        userAlias, user.getUserId()));

        } else if (DATA_SCOPE_DEPT_AND_CHILD.equals(dataScope)) {
            sqlString.append(StringUtils.format(
                " OR {}.dept_id IN ( SELECT dept_id FROM sys_dept WHERE dept_id = {} or find_in_set( {} , ancestors ) OR {}.user_id = {} )  ",
                deptAlias, user.getDeptId(), user.getDeptId(), userAlias, user.getUserId()));
        } else if (DATA_SCOPE_SELF.equals(dataScope)) {
            if (StringUtils.isNotBlank(userAlias)) {
                sqlString.append(
                    StringUtils.format(" OR {}.user_id = {} ", userAlias, user.getUserId()));
            } else {
                // 数据权限为仅本人且没有userAlias别名不查询任何数据
                sqlString.append(" OR 1=0 ");
            }
        }
        if (StringUtils.isNotBlank(sqlString.toString())) {
            //添加权限sql
            ObjectStruct objectStruct = new ObjectStruct(joinPoint.getArgs()[0]);
            objectStruct.getMethod("setDataScope",
                new Object[]{" AND ( " + sqlString.substring(4) + " )"});
        }
    }

    /**
     * 是否存在注解，如果存在就获取
     */
    private DataScope getAnnotationLog(JoinPoint joinPoint) {
        Signature signature = joinPoint.getSignature();
        MethodSignature methodSignature = (MethodSignature) signature;
        Method method = methodSignature.getMethod();

        if (method != null) {
            return method.getAnnotation(DataScope.class);
        }
        return null;
    }
}
